feign上传与下载

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在spring cloud 开发过程中，有个这样的需求，一个模块主要是管理素材，例如文件等等。而其他模块有时候需要和这个模块进行文件传输等，而模块与模块之间用通讯用Feign，在spring环境下用@FeignClient注解。为了避免遗忘，顾整理下。

Feign 上传文件

  • Feign 上传文件有现成的框架，网上也有不少文章，这只是稍做记录

框架地址：feign-form

maven 依赖：
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<dependency>
    <groupId>io.github.openfeign.form</groupId>
	<artifactId>feign-form</artifactId>
	<version>2.2.1</version>
</dependency>

<dependency>
	<groupId>io.github.openfeign.form</groupId>
	<artifactId>feign-form-spring</artifactId>
	<version>2.2.1</version>
</dependency>
编写MultipartFile实现类
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import org.springframework.util.FileCopyUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;

public class InMemoryMultipartFile implements MultipartFile {

    private final String name;
    private final String originalFileName;
    private final String contentType;
    private final byte[] payload;

    public InMemoryMultipartFile(File file) throws IOException {
        this.originalFileName = file.getName();
        this.payload = FileCopyUtils.copyToByteArray(file);
        this.name = "file";
        this.contentType = "application/octet-stream";
    }

    public InMemoryMultipartFile(String originalFileName, byte[] payload) {
        this.originalFileName = originalFileName;
        this.payload = payload;
        this.name = "file";
        this.contentType = "application/octet-stream";
    }

    public InMemoryMultipartFile(String name, String originalFileName, String contentType, byte[] payload) {
        if (payload == null) {
            throw new IllegalArgumentException("Payload cannot be null.");
        }
        this.name = name;
        this.originalFileName = originalFileName;
        this.contentType = contentType;
        this.payload = payload;
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public String getOriginalFilename() {
        return originalFileName;
    }

    @Override
    public String getContentType() {
        return contentType;
    }

    @Override
    public boolean isEmpty() {
        return payload.length == 0;
    }

    @Override
    public long getSize() {
        return payload.length;
    }

    @Override
    public byte[] getBytes() throws IOException {
        return payload;
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return new ByteArrayInputStream(payload);
    }

    @Override
    public void transferTo(File dest) throws IOException, IllegalStateException {
        new FileOutputStream(dest).write(payload);
    }

}
编写接口
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@FeignClient(value = "material", configuration = FuyhuiMateClient.MultipartSupportConfig.class)
public interface FuyhuiMateClient {

    @PostMapping("/uploadFile")
    @Headers("Content-Type: multipart/form-data")
    ResponseMO uploadFile(@RequestPart("file") MultipartFile file);


    class MultipartSupportConfig {

        @Autowired
        ObjectFactory<HttpMessageConverters> messageConverters;

        @Bean
        @Primary
        @Scope("prototype")
        public Encoder multipartFormEncoder() {
            return new SpringFormEncoder(new SpringEncoder(messageConverters));
        }
    }
}

上传处理Controller

上传处理Controll和平时的SpringMVC上传是一样，这里就不在记录了。

Feign 下载文件

Google、Baidu了很久，也在Github上找了，找了很就也没找到解决方案，不